Okay, I have a space game where I have generated planets that you dig and build on terreria or starbound style. I am just now reaching the point where I want to add scorch marks,grass,ore and other things attached to either dirt, rock, wood ect. So my question is:

Is it better to make a new frame inside of my tilemap which each different land type holding the same ore, or drawing the ore as a sprite that just lies on top of the tilemap?